Shuttle-motion for looms.



PATENTED JULY 3, 1906.-

H. L. GOODWIN. SHUTTLE MOTION FOR LUOMS.

APPLICATION FILED 00T.5,1904.

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UNITED STATES PATENT OFFICE.

HARRY L. GOODWIN, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO GOODWIN PICKER COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF THE DISTRICT OF COLUMBIA.

Specification of Letters Patent.

Patented July 3, .1906.

Application filed October 5,1904. Serial No. 227,249.

To a whom it may concern.-

Be it known that I, HARRY L. GoonwrN, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Shuttle-Motions for Looms, of which the following is a specification.

The object of the present invention is to produce a new form of slow-down devices for the picker-stick of a loom in its backward stroke in order to lessen the shock to the shuttle and also to store up energy through the force of the shuttle in giving the pickerstick its backward stroke to aid in throwing the picker-stick forward again.

The picker-stick is guided so that the striking-point of the pickershall move in a path in alinement with the path of the striking-point of the shuttle by means of a fulcrum-stud projecting from the picker-stick through a vertical guide-slot and by a guidestud projecting from the picker-stick at a point above the fulcrum-stud and extending through a curved guide-slot. This feature of construction is broadly covered in another application by me.

As usually constructed the picker-stick in its backward stroke does not move past the vertical. In the present invention the curved guide-slot is carried far enough both forward and rearward with relation to the vertical slot to permit the picker-stick to turn rearwardly past the vertical. I connect with the guide-plate and the picker-stick or its holder a spring which is in its normal position when the picker-stick is in its vertical position and the guide-stud is in the lower part of the curved slot and which is put under tension when the picker-stick is turned from the vertical either forward or back, the spring when under tension having a tendency to pull the stick back to the vertical. The spring thus employed may be either a compression or an expansion spring.

The invention will now be fully described,-

reference being had to the accompanyin drawings, and the novel features thereof wil be particularly pointed out in the claims at the close of the specification.

In the drawings, Figure 1 is a front elevation of a machine, partly broken away, showing the picker-stick and guide mechanism and slowdown device in which a compression-spring is employed. Fig. 2 is a side elevation viewed from the right of Fig. 1. Fig. 3 is a vertical section on line 3 3 of Fig. 1. Fig. 4 shows a modification in which an expansion-spring is employed instead of a compression-spring. Fig. 5 is a view showing the form of spring of Fig. 1 when the pickerstick is in the forward position.

Referring now to the drawings, 1 represents the frame, 2 the lay-beam, and 3 the lay rock-shaft. Mounted on the lay rock- 'shaft 3 is the guide bracket or plate 4.

Formed in the guide-bracket 4 are a vertical slot 5 and a curved slot 6. In speaking of slot 5 as being vertical it is meant that it is vertical when the picker-stick stands in a vertical position.

The curved slot 6 is located above the vertical slot and transversely in relation thereto, extending both to ri ht and left of a straight line through the middle of the vertical slot. The lowest point in the curve is in said median line.

The picker-stick 7 is held in a metallic sup port or case 8, which serves as a reinforce and furnishes bearings for the fulcrum and guidebolts.

The fulcrum-stud 9 is formed with a head 12, which bears against the outer face of the guide-plate. The shank of the stud passes through the vertical uide-slot 5 in the plate 4 and through a hole in the holder 8 and stick 7.

A shoulder 13 on the stud forms an abutment between which and a washer 14 the stick and its holder are clamped by setting up the nut 18 and its locking-sleeve 19. Any suitable clamping mechanism may be employed, however.

An antifriction sleeve-roller 17 on the porbears against a lug 20 at the upper end of theslot. A finger 21 extends from the lug 20 down inside of the spring to retain the upper end of the spring in position.

A guide-stud 10, similar to stud 9, passes through the curved slot 6 and through the picker stick and holder and is clamped in the same manner as stud 9.

The curvature of slot 6 and its disposition relative to the vertical slot 5 are such that when the picker-stick is rocked to throw the shuttle the guide-stud 10 will move up the curved slot and the striking-point of the picker 22 will move in a straight line with the point of. the shuttle, as shown by the dotted lines 2 3.

As the guide-stud 10 moves forward up the curve in the guide-slot 6 the fulcrum-stud 9 will rise in the vertical slot 5 and of course the picker-stick turns from the vertical to an it the lower end of the spring but the up-' per end of the spring is held relatively stationary by its engagement with the lug and finger 21, which are a part of the plate 4. This gives to the spring a peculiar compressing effect. It compresses it upwardly and bends it, as shown in Fig. 5. On the return movement of the shuttle the pickerstick first comes back to the vertical and the spring straightens out, and the reflex movement of the spring in straigthening out aids in carrying back the picker-stick; but after reaching the vertical position it moves on past the vertical, carrying the guide-stud up the back part of the curve, raising the fulcrum-stud in the vertical slot and again compressing and bending the spring in there verse direction from that on the forward movement, as indicated in Fig. 5. The spring thus serves as a slow-down for the picker-stick and softens the blow against the wall at the end of the slot. The energy consumed in thus compressing the spring is stored up and aids the forward movement of the picker-stick.

In Fig. 4 is shown the adaptation of an expansion-spring 24, which latter is fastened at its upper end to the picker-stick holder, the lower end thereof being fastened to the guideplate.

What I claim is 1. A shuttle-motion for looms having a picker-stick and picker, a non-adjustable guide-plate fixed relatively to the rockershaft provided with a horizontally-disposed guide-slot convexly curved, a vertical fulcrum-guide slot below the said curved slot in alinement with the bottom point of the curve therein, a guide-stud secured to the picker-stick and engaging with said curved slot and a fulcrum-stud secured to the said stick and engaging with the said vertical slot, the construction and disposition of the slots and studs being such as to normally hold the stick in a vertical position and cause it to turn on its fulcrum past the vertical both in its forward and backward stroke and to always retain the striking-point of the picker in a straight line with the striln'ng-point of the shuttle.

2. A shuttle-motion for looms having a picker-stick and picker, a guide-plate provided with a horizontally-disposed guide-slot convexly curved, a vertical fulcrum-guide slot below the said curved slot and in alinement with the bottom point of .the curve therein, a guide-stud secured to the pickerstick and engaging with said curved slot, a fulcrum-stud secured to the stick and engaging with said vertical slot, and a spring one end of which engages the said guide-plate and the other end of which engages with the picker-stick, the movement of the stud up the curved slot in either direction causing the stud in the vertical slot to rise and put tension on the spring.

3. A shuttle-motion for looms having a picker-stick, a guide-plate provided with a straight vertical fulcrum-slot, a curved guideslot above the fulcrum-slot, a guide-stud secured to the picker-stick and engaging with said curved slot, a fulcrum-stud secured to the stick and engaging with said vertical slot, and a spring one end of which engages with said guide-plate and the other end of which engages with said picker-stick, the construction and disposition of the studs and slots guiding the picker and permitting the picker-stick to turn back past the vertical and put tension on the spring.

In testimony whereof I have affixed my signature in presence of two witnesses.

HARRY L. GOODWIN. 

